5:20am
Pope John Paul II condemns attacks.
8:45am
European stock markets observe silence for one minute in remembrance
10:00am
Congress reconvenes.
10:30am
New York City Mayor Rudolph Giuliani warns that death toll will be in the thousands.
10:50am
President Bush calls attacks an 'act of war.'
10:54am
CNN reports that two phone calls from al Qaeda members referring to attacks have been intercepted.
11:20am
FAA does not allow air travel to resume at noon.
1:00pm
FBI takes several people in Boston and Florida into custody for questioning.
1:20pm
Taliban officials ask the US to not attack Afghanistan.
2:15pm
Morgan Stanley says the 'vast majority' of its World Trade Center employees are safe.
2:20pm
FAA allows planes diverted on Tuesday to finish their flights.
2:57pm
White House claims to have credible information that Air Force One and White House were targets.
3:40pm
US Attorney General John Ashcroft says there were 3-6 hijackers per plane, armed with knives and box cutters, some terrorists trained as pilots in the US, and calls investigation most massive in US history.
4:00pm
NATO announces it will back US military action, says 'when one member is attacked, then all members are attacked.'
5:20pm
Rescue workers are evacuated from World Trade Center area due to partial collapse of One Liberty Plaza, Nasdaq's new headquarters.
5:45pm
Relatives of United Airlines Flight 93 crash victim Jeremy Glick say he called them from the plane and said people on the flight intended to attempt to stop the hijackers.
6:00pm
G7 issue statement promising to support banks experiencing high withdrawal demands.
7:00pm
Congress holds prayer vigil in Capitol Rotunda.